tree b5e8acc8d3280beedb9c30d6edf9f9bfac39a29e
parent aafcdcc9ebd72b24bf8686f624ff98bb919de5fd
author Kevin Wolf <kwolf@redhat.com> 1334135197 +0200
committer Kevin Wolf <kwolf@redhat.com> 1334843332 +0200

block: Drain requests in bdrv_close

If an AIO request is in flight that refers to a BlockDriverState that
has been closed and possibly even freed, more or less anything could
happen. I have seen segfaults, -EBADF return values and qcow2 sometimes
actually catches the situation in bdrv_close() and abort()s.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>